12215520994 has 16 divisors (see below), whose sum is σ = 18847785600. Its totient is φ = 5934795984.

The previous prime is 12215520979. The next prime is 12215520997. The reversal of 12215520994 is 49902551221.

It is not an unprimeable number, because it can be changed into a prime (12215520997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454389 + ... + 480520.

It is an arithmetic number, because the mean of its divisors is an integer number (1177986600).

Almost surely, 2^12215520994 is an apocalyptic number.

12215520994 is a deficient number, since it is larger than the sum of its proper divisors (6632264606).

12215520994 is a wasteful number, since it uses less digits than its factorization.

12215520994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935097.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 12215520994 in words is "twelve billion, two hundred fifteen million, five hundred twenty thousand, nine hundred ninety-four".